<template>
	<view class="uni-pagination">
		<view class="uni-pagination__btns">
			<view @click="clickLeft" :class="setLeftBtnClass" :hover-class="setLeftBtnHoverClass" :hover-start-time="20" :hover-stay-time="70">				
				<xxicon color="#333" size="60" type="arrowleft"></xxicon>				
			</view>
			<view @click="clickRight" :class="setRightBtnClass" :hover-class="setRightBtnHoverClass" :hover-start-time="20" :hover-stay-time="70">				
					<xxicon color="#333" size="60" type="arrowright"></xxicon>			
			</view>
		</view>
		<view class="uni-pagination__num">
			<text class="uni-pagination__num-current">{{currentIndex}}</text>/{{maxPage}}页&#12288;共{{total}}条记录&#12288;
		</view>
	</view>
</template>

<script>	
	export default {
		name: "uni-pagination",		
		props: {
			prevText: {
				type: String,
				default: '上一页'
			},
			nextText: {
				type: String,
				default: '下一页'
			},
			current: {
				type: [Number, String],
				default: 1
			},
			total: { //数据总量
				type: [Number, String],
				default: 0
			},
			pageSize: { //每页数据量
				type: [Number, String],
				default: 10
			},
			showIcon: { //是否以 icon 形式展示按钮
				type: [Boolean, String],
				default: false
			}
		},
		watch: {
			current(val) {
				this.currentIndex = Number(val)
			}
		},
		data() {
			return {
				currentIndex: Number(this.current)
			}
		},
		computed: {
			maxPage() {
				let maxPage = 1
				let total = Number(this.total)
				let pageSize = Number(this.pageSize)
				if (total && pageSize) {
					maxPage = Math.ceil(total / pageSize)
				}
				return maxPage
			},
			setLeftBtnClass() {
				let classList = ['uni-pagination__btn']
				if (Number(this.currentIndex) === 1) {
					classList.push('uni-pagination--disabled')
				}
				return classList
			},
			setLeftBtnHoverClass() {
				let hoverClass = 'uni-pagination--hover'
				if (Number(this.currentIndex) === 1) {
					hoverClass = ''
				}
				return hoverClass
			},
			setRightBtnClass() {
				let classList = ['uni-pagination__btn']
				if (Number(this.currentIndex) === this.maxPage) {
					classList.push('uni-pagination--disabled')
				}
				return classList
			},
			setRightBtnHoverClass() {
				let hoverClass = 'uni-pagination--hover'
				if (Number(this.currentIndex) === this.maxPage) {
					hoverClass = ''
				}
				return hoverClass
			}
		},
		methods: {
			clickLeft() {
				if (Number(this.currentIndex) === 1) {
					return
				}
				this.currentIndex -= 1
				this.change('prev')
			},
			clickRight() {
				if (Number(this.currentIndex) === this.maxPage) {
					return
				}
				this.currentIndex += 1
				this.change('next')
			},
			change(e) {
				this.$emit('change', {
					type: e,
					current: this.currentIndex
				})
			}
		}
	}
</script>

<style>
	@charset "UTF-8";
	.uni-pagination {
		width: 100%;
		box-sizing: border-box;
		padding: 0 30upx;
		position: relative;
		overflow: hidden;
		display: flex;
		flex-direction: row
	}

	.uni-pagination__btns {
		flex: 1;
		display: flex;
		justify-content: space-between;
		align-items: center;
		flex-direction: row
	}

	.uni-pagination__btn {
		color: #333;		
		border-radius: 100px;
		width: 40upx;
		height: 60upx;
		padding: 0 16upx;
		/* line-height: 60upx; */
		font-size: 28upx;
		/* box-sizing: border-box; */
		position: relative;
		/* background-color: #f8f8f8; */
		display: flex;
		flex-direction: row;
		justify-content: center;
		align-items: center
	}

	.uni-pagination__btn:after {
		content: "";
		width: 200%;
		height: 200%;
		position: absolute;
		top: 0;
		left: 0;
		/* border: 1px solid #c8c7cc; */
		transform: scale(.5);
		transform-origin: 0 0;
		box-sizing: border-box;
		/* border-radius: 12upx */
	}

	.uni-pagination__num {
		width: 460upx;
		height: 60upx;
		line-height: 60upx;
		font-size: 32upx;
		color: #BBBBBB;
		position: absolute;
		left: 50%;
		display: flex;
		flex-direction: row;
		justify-content: center;
		align-items: center;		
		top: 0;
		transform: translateX(-50%)
	}

	.uni-pagination__num-current {
		color: #ff5722
	}

	.uni-pagination--disabled {
		opacity: .3
	}

	.uni-pagination--hover {
		color: rgba(0, 0, 0, .6);
		/* border: #ff5722; */
		background-color: #ff5722;
	}
</style>